EP0225982B1 - Lenkungsdämpfer für ein Motorrad oder dergleichen - Google Patents

Lenkungsdämpfer für ein Motorrad oder dergleichen Download PDF

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Publication number
EP0225982B1
EP0225982B1 EP86113915A EP86113915A EP0225982B1 EP 0225982 B1 EP0225982 B1 EP 0225982B1 EP 86113915 A EP86113915 A EP 86113915A EP 86113915 A EP86113915 A EP 86113915A EP 0225982 B1 EP0225982 B1 EP 0225982B1
Authority
EP
European Patent Office
Prior art keywords
friction element
steering
wall
head tube
control head
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP86113915A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0225982A1 (de
Inventor
Laszlo Peres
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP0225982A1 publication Critical patent/EP0225982A1/de
Application granted granted Critical
Publication of EP0225982B1 publication Critical patent/EP0225982B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K21/00—Steering devices
    • B62K21/08—Steering dampers

Definitions

  • the invention relates to a steering damper for a motorcycle of the type mentioned in the preamble of claim 1 and made known by FR-A-1 264 592.
  • the friction element disclosed in this publication can be designed as a plastic ring which has longitudinal projections on its outer circumference and on its through opening. These are in sliding contact with the wall of the steering head tube and with the outer jacket of the steering shaft.
  • a friction torque is generated by the known friction element immediately after the motorcycle steering has responded.
  • This has the disadvantage that the high-speed stability of the motorcycle in the case of vibrations introduced into this in the high-speed range (approximately 150 to 200 km / h) - caused by restless steering, body movements of the driver or the like - is deteriorated in such a way that the driving behavior of the motorcycle can be impaired .
  • the object of the invention is therefore to design a steering damper of the type mentioned in the preamble of claim 1 with relatively little manufacturing effort such that it does not affect the driving behavior of the motorcycle in the high-speed range.
  • the friction element according to the invention consists of rubber-elastic material (about 40 to 50 Shore hardness) and rests against the wall of its through opening with radial prestress on the steering shaft, this can corresponding to the rubber elasticity of the friction element in relation to the rigid control head tube from its rest position in mutually opposite circumferential directions shift angularly by about 1 ° so that the high-speed stability of the motorcycle is not impaired, for example, in the event of steering unrest introduced into it, body movements of the driver or the like. Because only after an angular offset of the steering shaft by about 1 ° in each case does the effect of the friction element due to its frictional action on the steering shaft respond as a "sliding friction" with a frictional torque of about 1-2.5 Nm.
  • the steering damper according to the invention can also be used to improve the accuracy of the motorcycle when cornering at high speed. However, a friction torque of up to about 2.5 Nm can still be borne when the motorcycle is traveling slowly.
  • the friction element with its outer jacket is fixed in a rotationally fixed manner on the inner wall of the control head tube (feature of patent claim 2).
  • the friction element consists of two coaxial receptacles between which a rubber layer is vulcanized non-rotatably.
  • the inner receptacle carries a rubber inner layer on its inner wall.
  • a friction element designed in this way can be inserted into the control head tube in a simple manner via its outer receiving sleeve, which is made of plastic, and can be locked in this, for example, by a locking screw (feature of patent claim 4).
  • the rubber inner layer provided on the inner, metal receiving sleeve expediently runs in a longitudinal section in a wave-like manner.
  • the shaft crests lie with such a radial preload on the steering shaft that a frictional torque of about 1-2.5 Nm arises.
  • silicone grease in the troughs of the rubber inner layer (features of claims 5 and 6). Due to the wavy design of the rubber inner layer, there is hardly any wear on it.
  • the lubricating grease filling in the pocket-shaped wave troughs also contributes to this, which also ensures trouble-free operation of the friction element in the entire normal motorcycle temperature range.
  • the thickness of the rubber inner layer and thus its radial preload for the friction torque to be provided on the steering shaft can be precisely defined by the internal receiving sleeve provided on the friction element, while the radial extension of the rubber layer that ensures the angular rotation between the steering shaft and the steering head tube is also precisely defined by the internal receiving sleeve can be determined constructively.
  • a steering head tube 2 is located at the front end of a frame 1 of a motorcycle.
  • a steering shaft 4 is rotatably supported by means of a roller bearing 3 located above and not shown below.
  • the latter At its end section projecting beyond the control head tube 2, the latter carries an upper fork bridge 5 in a rotationally fixed manner, on which a front wheel fork 6 and a link 7 are located.
  • a friction element 8 with an annular cross section is inserted into the control head tube 2, which serves as a motorcycle steering damper 8 ′ and coaxially surrounds the steering shaft 4.
  • the friction element 8 consists of an outer, made of plastic the receiving sleeve 9 and a coaxial to this inner receiving sleeve 10, which consists of metal.
  • a rubber layer 11 with approximately 40 to 50 Shore hardness is vulcanized into the radial intermediate space between the two receiving sleeves 9 and 10, so that the two receiving sleeves 9 and 10 are connected to one another in a rotationally fixed manner.
  • the steering shaft 4 can optimally rotate in relation to the control head tube 2 about its longitudinal axis - as will be explained below - it is also conceivable that the rubber layer 11 is provided with recesses.
  • a locking screw 12 is screwed into the control head tube 2 transversely to its longitudinal axis and engages with its free end section in a recess 13 provided in the central region of the longitudinal extent of the outer receiving sleeve 9.
  • the friction element 8 is fixed in a rotationally and thrust-resistant manner when the locking screw 12 is tightened on the inner tube wall 2 'of the control head tube 2.
  • a rubber inner layer 14 is vulcanized onto the inner wall 10 'of the inner receiving sleeve 10 facing the steering shaft 4 - which is somewhat longer than the outer receiving sleeve 9.
  • Their wall facing the steering shaft 4 runs in a longitudinal section in a wave-shaped manner, wherein four bead-like circumferential wave crests 14 ′ are formed in the illustrated embodiment.
  • the inside diameter of the through opening 8 " is dimensioned in the manufacturing state of the friction element 8 such that, in its installed position, the shaft crests 14 'rest against the outer jacket of the steering shaft 4 with such a radial preload that during steering movements of the front wheel fork 6 in the directions of the double arrow a
  • the rubber inner layer 14 also has a Shore hardness of about 40 to 50, which can of course be larger and smaller if necessary - just like the Shore hardness of the rubber layer 11.
  • the provided inner receiving sleeve 10 enables an exact definition of the thickness of the rubber inner layer 14. This can also exactly their radial preload on the steering. shaft 4 can be determined. In addition, the thickness of the rubber layer 11 and thus its torsional elasticity can also be exactly determined by the inner receiving sleeve 10. Finally, it is an advantage of the outer receiving sleeve 9 that the friction element 8 can be easily mounted and locked in the control head tube 2 against torsional turning.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Dampers (AREA)
  • Axle Suspensions And Sidecars For Cycles (AREA)
EP86113915A 1985-12-19 1986-10-07 Lenkungsdämpfer für ein Motorrad oder dergleichen Expired EP0225982B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3545139 1985-12-19
DE3545139 1985-12-19

Publications (2)

Publication Number Publication Date
EP0225982A1 EP0225982A1 (de) 1987-06-24
EP0225982B1 true EP0225982B1 (de) 1989-04-05

Family

ID=6288965

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86113915A Expired EP0225982B1 (de) 1985-12-19 1986-10-07 Lenkungsdämpfer für ein Motorrad oder dergleichen

Country Status (3)

Country Link
EP (1) EP0225982B1 (enrdf_load_stackoverflow)
JP (1) JPS62146791A (enrdf_load_stackoverflow)
DE (1) DE3662669D1 (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1300328A1 (en) * 2001-10-02 2003-04-09 Ducati Motor Holding S.p.A. A hydraulic steering damper for motor vehicles
EP1724183A3 (en) 2005-05-19 2011-06-22 GM Global Technology Operations, Inc. Steering column assembly having a vibration dampener
FR2958261B1 (fr) * 2010-04-01 2012-11-09 Matra Mfg & Services Ensemble de direction pour deux-roues
JP6313689B2 (ja) * 2014-07-31 2018-04-18 本田技研工業株式会社 鞍乗り型の車両のステアリングダンパ固定構造
ES3034439T3 (en) * 2020-12-07 2025-08-18 Hwg Horst Weidner Gmbh Bearing unit, method for using and functionally influencing a bearing unit, and vibration damper and method for using and functionally influencing a vibration damper

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB320469A (en) * 1928-08-29 1929-10-17 Stevens A J & Co 1914 Ltd Improvements in dampers for steering heads of motor cycles or the like
DE889870C (de) * 1949-06-05 1953-09-14 W Von Der Bey Fa Einstellbarer Lenkungsdaempfer fuer Kraftraeder
DE939251C (de) * 1950-08-20 1956-02-16 Motorrad Und Fahrradteilefabri Einstellbarer Lenkungsdaempfer fuer Kraftraeder
DE947137C (de) * 1951-03-10 1956-08-09 Motorrad Und Fahrradteilefabri Einstellbarer Lenkungsdaempfer fuer Kraftraeder

Also Published As

Publication number Publication date
JPH0562116B2 (enrdf_load_stackoverflow) 1993-09-07
JPS62146791A (ja) 1987-06-30
EP0225982A1 (de) 1987-06-24
DE3662669D1 (en) 1989-05-11

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